Vulnerability Database · Hex · cowlib · Version
cowlib 2.21.0
2.21.0 is affected by 5 vulnerabilities.
The vulnerabilities that cover this exact version are listed below with the fixed version to move to.
Critical 0 High 0 Medium 3 Low 2 Unrated 0
-
Released 08 Oct 2026
Also known from other sources 0
Newer releases 39
Database updated 23/Oct/2026
Release and licence data published by hex.pm. Licence information is not legal advice.
Concerned about your application's security?
Vulert continues monitoring your dependencies and alerts you when new vulnerabilities are disclosed. No installation and no source-code access required.
01 Vulnerabilities affecting this version
cowlib 2.21.0 vulnerabilities
5 vulnerabilities cover cowlib 2.21.0. Open the full list in the database.
| Vulnerability | Severity | Fixed version | Disclosed |
|---|---|---|---|
| CVE-2026-43971: cowlib Package Vulnerability - Link Header Directive Smuggling | 6.3 medium | No fix published | 18 Aug 2026 |
| CVE-2026-43966: cowlib HTTP Response Splitting via Non-VCHAR Bytes | 6.3 medium | No fix published | 08 Jun 2026 |
| CVE-2026-43968: cowlib CR Injection Vulnerability Leading to Event Splitting | 6.3 medium | No fix published | 11 May 2026 |
| CVE-2026-43969: cowlib Cookie Request Header Injection Vulnerability | 2.1 low | No fix published | 11 May 2026 |
| CVE-2026-43969: Cookie Request Header Injection Vulnerability in cowlib | 2.1 low | No fix published | 11 May 2026 |
Looking for another version, or everything Vulert holds for cowlib?
Questions
About cowlib 2.21.0
Is cowlib 2.21.0 vulnerable?
Yes. 5 vulnerabilities in the Vulert database cover cowlib 2.21.0: 0 critical, 0 high, 3 medium and 2 low. Each entry above names the fixed version to move to.
Is 2.21.0 the latest release of cowlib?
No. 2.21.0 was published 08 Oct 2026, and newer releases exist. Newer is not automatically safer — the version table on the package page shows what each release carries.
How do I monitor cowlib for upcoming vulnerabilities?
Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the cowlib version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.